=\(\sqrt{4^2+2\times4\times\sqrt{7}+\left(\sqrt{7}\right)^2}\)
= \(\sqrt{\left(4+\sqrt{7}\right)^2}\)= \(4+\sqrt{7}\)
=\(\sqrt{4^2+2\times4\times\sqrt{7}+\left(\sqrt{7}\right)^2}\) =\(\left(\sqrt{4+\sqrt{7}}\right)^2\) =\(\left|4+\sqrt{7}\right|\) =\(4+\sqrt{7}\)
Rút gọn: \(\sqrt{23+8\sqrt{7}}-\sqrt{7}\)
giải gấp giúp e nha
rút gọn biểu thức:
\(\sqrt{8-2\sqrt{7}}-\sqrt{23-8\sqrt{7}}\)
Rút gọn:
D=\(\sqrt{11-6\sqrt{2}}-3+\sqrt{2}\)
E=\(\sqrt{23+8\sqrt{7}}-\sqrt{7}\)
Rút Gọn \(\sqrt{8+3\sqrt{7}}-\sqrt{8-3\sqrt{7}}\)
rút gọn:
a, \(A=\dfrac{1}{\sqrt{8}+\sqrt{7}}+\sqrt{175}-2\sqrt{2}\)
rút gọn biểu thức
\(\sqrt{8-2\sqrt{7}-\sqrt{8+2\sqrt{7}}}\)
\(\sqrt{8-2\sqrt{7}}\)-\(\sqrt{8+2\sqrt{7}}\)rút gọn
Rút gọn : \(\left(\sqrt{8+2\sqrt{7}}+2\sqrt{8-2\sqrt{7}}\right)\left(\sqrt{63}+1\right)\)
Rút gọn
A=\(\sqrt{8+2\sqrt{7}}+\sqrt{8-2\sqrt{7}}\)7
B=\(\sqrt{9+4\sqrt{5}}+\sqrt{9-4\sqrt{5}}\)
